This is Biziele, one of the young lammergeiers released in Picos de Europa National Park in 2014. He belongs to the Reintroduction Project, developed by the Lammergeier Foundation..
Biziele Breaking Bones in Picos de Europa National Park
It is really amazing to observe how despite not having parents, he is already able to break bones. Is this an innate behaviour? We do not really know. Perhaps he found other wild lammergeiers and learned from them.